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socket: use more robust socket name handling

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Signed-off-by: Julien Danjou <julien@danjou.info>
This commit is contained in:
Julien Danjou 2008-08-26 18:14:39 +02:00
parent c8bd181b27
commit b3f86152df
1 changed files with 53 additions and 17 deletions
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70
common/socket.c
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@ -38,28 +38,62 @@
struct sockaddr_un *
socket_getaddr(const char *display)
{
char *homedir, *tmp;
const char *real_display = NULL;
ssize_t path_len, display_len;
char *homedir, *tmp, *dot;
char *hostname = NULL, *screen = NULL;
ssize_t path_len, hostname_len, screen_len;
struct sockaddr_un *addr;
addr = p_new(struct sockaddr_un, 1);
homedir = getenv("HOME");
display_len = a_strlen(display);
if(display_len)
if(a_strlen(display))
{
/* find hostname */
if((tmp = strchr(display, ':')))
real_display = tmp + 1;
{
/* if display starts with : */
if(tmp == display)
{
hostname = a_strdup("localhost");
hostname_len = 9;
}
else
{
hostname_len = tmp - display;
hostname = a_strndup(display, hostname_len);
}
tmp++;
if((dot = strchr(tmp, '.')))
{
screen_len = dot - tmp;
screen = a_strndup(tmp, screen_len);
}
else
{
screen = a_strdup(tmp);
screen_len = a_strlen(screen);
}
}
else
real_display = display;
if((tmp = strrchr(display, '.')))
*tmp = '\0';
{
hostname = a_strdup("unknown");
hostname_len = 7;
screen = a_strdup("0");
screen_len = 1;
}
}
else
{
hostname = a_strdup("localhost");
hostname_len = 9;
screen = a_strdup("0");
screen_len = 1;
}
/* a_strlen(display) because we strcat on display and
* + 2 for / and \0 */
path_len = a_strlen(homedir) + sizeof(CONTROL_UNIX_SOCKET_PATH)-1
+ (display_len ? (a_strlen(real_display)) : 1) + 2;
/* + 2 for / and . and \0 */
path_len = a_strlen(homedir) + sizeof(CONTROL_UNIX_SOCKET_PATH) - 1
+ screen_len + hostname_len + 3;
if(path_len >= ssizeof(addr->sun_path))
{
@ -69,10 +103,12 @@ socket_getaddr(const char *display)
a_strcpy(addr->sun_path, path_len, homedir);
a_strcat(addr->sun_path, path_len, "/");
a_strcat(addr->sun_path, path_len, CONTROL_UNIX_SOCKET_PATH);
if(display_len)
a_strcat(addr->sun_path, path_len, real_display);
else
a_strcat(addr->sun_path, path_len, "0");
a_strcat(addr->sun_path, path_len, hostname);
a_strcat(addr->sun_path, path_len, "|");
a_strcat(addr->sun_path, path_len, screen);
p_delete(&hostname);
p_delete(&screen);
addr->sun_family = AF_UNIX;